London has been hit by strong wind, hail and rain (Photo by Oli Scarff/Getty Images)

Hail has hit London today, with John R Hutchison warning on Twitter earlier: “Holy crap! Massive hailstorm just blew through town from north, headed for London. Strongest hail I’ve seen in UK! Thunder too. Get indoors.”

A yellow warning means that severe weather is possible over the next few days and could affect you.

The Met Office says Yellow means that you should plan ahead and think about possible travel delays, or the disruption of your day to day activities. A spokesman said: “The Met Office is monitoring the developing weather situation and Yellow means keep an eye on the latest forecast and be aware that the weather may change or worsen, leading to disruption of your plans in the next few days.”

The Olympic Games are heading to Rio in 2016 (yes, we can’t believe it will be four years since London 2012 either) and the hype is already building. Join thousands in Trafalgar Square to celebrate Brazil Day and get a taste of what the vibrant country has to offer.

Up at The O2 has teamed up with London24 to give one lucky reader the chance to experience urban mountaineering this summer with an exhilarating 90-minute climb across the roof of one of London’s most iconic landmarks.